[Troubleshooting Misfire on Beams 3SGE LINK G4x Fury]

12 hours ago, Adamw said:

The injector duty cycle fault would have occurred when you run out of gas, the ecu would have increased injector PW as the fuel pressure dropped trying to keep AFR on target.  If you clear it it should disappear.  You have a fault showing on AN Volt 3, 5, 6 & 8 in the log also.  

I dont see anything relevant to a misfire in your log but there are some tune issues to sort out:

1. VVT hasn't been calibrated, not working at all. 
2. Accel fuel deadband is too low, you have accel fuel dumping in the whole time, which means your fuel tune would be messed up from that.  
3. Your ethanol temp is reading 200°C, likely due to DI4 edge set wrong, this would have also messed up the fuel tune. 
4. IAT trim should be off in modelled mode. 
5. Your SPWA is adding 0.2 or more ms at PW from 0.5-1.0, that is 20-40% extra fuel?  

 

I'm not exactly familiar with much of it to be completely honest. But if the electrical side and tuning side of things aren't causing a misfire I'm guessing id be looking at a mechanical issue. As you said nothing out of the ordinary that would cause a misfire on the log. I'll be digging into valve train next, will try to post an update after. Thank you for your inputs.

[Troubleshooting Misfire on Beams 3SGE LINK G4x Fury]

35 minutes ago, Vaughan said:

Good chance it's a blocked injector if you ran it dry, maybe try swapping injectors around to see if it follows the injector. Your Lambda value also doesn't seem excessively lean like I would expect from a total loss of one cylinder.

As a couple side note your fuel table values all look a bit low for a modelled tune which makes me think that your specified injector flow rate is wrong (too high) and you have warm up enrichment and IAT fuel trim and charge temp tables all on and with values in them where you should only be using charge temp for a modelled tune with warmup enrichment and IAT Fuel trim turned off.

Ive tried swapping the injectors, misfire stays in the same cylinder. If it makes a difference it has this code, dont believe it ever had it prior to this. ECU Fault Code 122: Injector Duty Cycle above Error High Value

[Troubleshooting Misfire on Beams 3SGE LINK G4x Fury]

Hey there gents, currently having an issue diagnosing a misfire on cylinder 3 in my Beams swapped AE86 with ITBs. Little bit of a backstory on how it happened. Saturday night, a friend and i went cruising late at night, hit some backroads and did a bit of "spirited" driving. Car was performing great for the whole night, always kept an eye on all my parameters nothing unusual. After about 5/6 hours driving I heard a noise coming from my engine, a ticking of some sort. To me it sounds like an exhaust leak but cant verify. But at idle it was running rough and you could hear a bit of a misfire from the exhaust. After that i decided to call it a night and went back home. On the way home the car ran out of gas (no fuel level currently) and it just died on me, after putting 2 gallons of gas it started back up and kept driving. Drove me 40 minutes home no problem, even while running on 3 cylinders, no loss of power or anything. Now im in the garage trying to fix that misfire then address that ticking noise i hear. So far ive checked compression on all 4 cylinders, All around 155 but cylinder 3 is at 170. Not entirely sure if that will affect the way the cylinder misfires. Checked for spark, swapped coils, checked injector pulse, did continuity test on both signals for coils and injectors. Power and grounds checking out as well. Now my question is if anybody can help me check out a log file i recorded and see if you can spot anything out of the ordinary as im just a hobbyist and dont exactly know the software. Ill attach both my tune and the recorded log of it misfiring. Anything else i can check to eliminate certain factors out? Just want to get back to driving lolLorenzo's Beams 86.pclx

Misfire Cyl 3 3SGE 86.llgx